Abstract:

Study the fertilizer technology of NPK on potato in dry land in order to find the best fertilizer technology and establish the regression equation. Obtain the high efficiency program by analysis the equation, which can provide the scientific evidence for high and stable yield on potato in Yanchi county. An “3414” experiment of potato was arrangemented on representative soil type in Yanchi county. The result showed that all fertilization treatments increased the yield of potato. The highest yield was treatment 9 (6125.88 kg/hm2), followed by treatment 13 (6121.77 kg/hm2), the lowest was treatment 2 (179.19 kg/hm2). The contribution of testland capability was 45.86%, it explained that the soil fertility was lower and fertilization has significant effect on yield of potato. The relative yield of nitrogen deficiency area, phosphorus deficiency area and potassium deficiency areas were 47.84%, 57.83%, 86.02%. It showed that the effect of nitrogen and phosphorus deficiency on potato cultivation was obvious. According to potato yield conditions in dryland, when potato yield more than 8000 kg/hm2, the agronomic measures was N 116.15-183.85 kg/hm2; P 60.70-89.30 kg/hm2; K 30.56-56.94 kg/hm2。